Brenzinger, M. (ed.) (1998) Endangered Languages in Africa. Cologne: Rüdiger Köper Verlag.
2.
Crystal, D. ( 2000) Language Death. Cambridge: Cambridge University Press.
3.
Friedrich, P. ( 2007) ‘English for Peace: Toward a Framework of Peace Sociolinguistics’, World Englishes26(1): 72-83.
4.
Gomes de Matos, F. ( 2001) ‘Applying the Pedagogy of Positiveness to Diplomatic Communication’, in M. Kurbalija and H. Slavik (eds) Language and Diplomacy, pp. 281-8. Malta: University of Malta, Mediterranean Academy of Diplomatic Studies.
5.
Krauss, M. ( 1992) ‘The World’s Languages in Crisis’, Language68: 4-10.
6.
Nettle, D. and Romaine, S. ( 2000) Vanishing Voices: The Extinction of the World’s Languages. Oxford: Oxford University Press.
7.
Phillipson, R. ( 1992) Linguistic Imperialism. Oxford: Oxford University Press.